moby: add support for building an ISO image for Moby

Signed-off-by: Rolf Neugebauer <rolf.neugebauer@docker.com>

alpine/.gitignore

@@ -1,3 +1,4 @@
 *.img
+mobylinux.iso
 Dockerfile.armhf
 etc/inittab

alpine/Dockerfile.iso

@@ -0,0 +1,24 @@
+FROM ubuntu:15.10
+
+RUN apt-get update && apt-get -y upgrade && apt-get -y install \
+  genisoimage \
+  xorriso \
+  syslinux \
+  syslinux-utils \
+  isolinux
+
+RUN mkdir -p /tmp/iso/isolinux && \
+    cp /usr/lib/ISOLINUX/isolinux.bin /tmp/iso/isolinux && \
+    cp usr/lib/syslinux/modules/bios/ldlinux.c32 /tmp/iso/isolinux
+
+COPY initrd.img /tmp/iso
+COPY kernel/vmlinuz64 /tmp/iso
+COPY isolinux.cfg /tmp/iso/isolinux
+
+RUN cd /tmp/iso && \
+    genisoimage -o ../output.iso -l -J -R \
+                -c isolinux/boot.cat  \
+                -b isolinux/isolinux.bin \
+                   -no-emul-boot -boot-load-size 4 -boot-info-table \
+                -V MobyLinux . && \
+    isohybrid ../output.iso

alpine/Makefile

@@ -12,6 +12,10 @@ initrd.img: Dockerfile mkinitrd.sh repositories $(ETCFILES)
 	docker build -t mobyinitrd:build .
 	docker run mobyinitrd:build /bin/mkinitrd.sh > $@
 
+mobylinux.iso: initrd.img Dockerfile.iso isolinux.cfg
+	docker build -f Dockerfile.iso -t mobyiso:build .
+	docker run mobyiso:build cat /tmp/output.iso > $@
+
 arm:	initrd-arm.img
 
 Dockerfile.armhf: Dockerfile
@@ -28,6 +32,8 @@ initrd-arm.img: Dockerfile.armhf
 
 clean:
 	rm -f initrd.img initrd-arm.img Dockerfile.armhf etc/inittab
+	rm -f mobylinux.iso
 	$(MAKE) -C packages clean
 	$(MAKE) -C kernel clean
 	docker images -q mobyinitrd:build | xargs docker rmi -f
+	docker images -q mobyiso:build | xargs docker rmi -f

alpine/isolinux.cfg

@@ -0,0 +1,5 @@
+DEFAULT linux
+LABEL linux
+    KERNEL /vmlinuz64
+    INITRD /initrd.img
+    APPEND earlyprintk=serial console=ttyS0